Annealing-box.



T: B..' G-RAY. ANNEALIEQ BOX. APPLICATION FILED o0T.2o,'1s1o 994 95 IPatented June 13, 191.1.

. m l u in V necting top wall or roof THOMAS B. GRAY, 0F PITTSBURG,PENNSYLVANIA.

ANNEALING-BOX.

Specification of Letters Yatent.

Patented June 13, 1911.

Application filed October 20, 1910. Serial No. 588,124.

To all whom it may concern:

Be it known that I, THOMAS B. GRAY, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and 'State ofPennsylvania, have invented certain new and useful Improvements inAnnealing- Boxes, of which the following is a specification.

My invention relates to cast metal annealing boxes and more particularlyto those comprising an integral structure. In devices of this kind asheretofore constructed various expedients, of a more or less complicatednature, have been resorted to, to prevent thestructure from becomingdistorted or cracked, render it useless, under such articles arenecessarily subjected.

The primary object of my invention is to provide a cast metal annealingbox which will not be injuriously afliected when subjected to suchsevere usage and be generally of a much more durable and economicalconstruction than those heretofore employed.

The invention includes a roof an side walls which may expand andcontract in any direction without injury, and consists in certain novelfeatures of construction hereinafter fully described and claimed, andillustrated in preferred form in the accompanying drawings, whereinFigural is a side elevation of a cast metal annealing box embodying myimprovements. Fig. 2 a plan view of the same. Figs. 3 and i, verticalsections taken on lines TIL-HI and IV-'IV of Fig. 2, and Fig. 5 ahorizontal section on line V-V of Fig. l.

As illustrated in its preferred form my device consists of an integralcast metal structure comprising side walls 2 and a con- 3. Walls '2 maybe provided with trunnions 4: of any preferred construction, and attheirlower ends with outwardly extending supporting flanges 5.

To permit of the free expansion and contraction of the structure in anydirection, each of the side walls and roof consists of a series ofoutwardly extending bulges 6 and corresponding interior depressions 7arranged in'parallel rows. Each of the side walls 2 is formed with aseries of vertically disposed corrugations 8 arranged in parallel rowsand continued across the roof to interintersecting the sect each otherat right angles, as shown in Fig. 2. The side walls are also formed witha series of horizontally disposed corrugations 9 arranged in parallelrows intersecting corrugations 8 to provide a wall in accordance withthe above description, and the intersection of corrugations 8 upon theroof provides a similar construction therefor.

In order to permit of a still greater amount I of expansion and slopeupwardly toward its center, as shown at 10, in Figs. 1, 3 and 4.

The corrugations may be \I-shaped, to give an approximately pyramidalbulge as shown in the drawings or they may be of any preferred contourand arranged at other than right angles to each other without de partingfrom the nature of my invention and while I have shown my invention inconnectionwith an annealing box approximately square in cross section itwill be obvious that it is equally applicable to annealthose of anyother preferred form.

I claim 1. An annealing box comprising side walls and a roof, the wallsand roof each formed with two sets of corrugations extending across themin rows, one set of corrugations other set thereon at an angle to formoutwardly extending bulges and corresponding interior depressions.

2. An annealing box comprising side walls and a roof, the walls and roofeach formed with two sets of corrugations extending across them inparallel rows, one set of corrugations intersect'ng the other-setthereon at right angles.

contraction the roof may ing boxes having cylindrical side walls or 3.An annealing box comprising side walls and a roof, the walls and roofeach formed with two sets of V-shaped corrugations extending across themin parallel rows, one-set of corrugations intersecting thereon at rightan ice.

4. An annealing ox walls and a roof comprisin an. ntegral structure, thewalls and mo each formed with two sets of corrugations extending acrossthem in parallel rows, one set of corrugations intersecting the otherset thereon at approximately right angles 5. An annealing'box and aroof, thereof sloping upwardly tecomprising side walls the other :set

consisting of side ward its center, the Walls and roof each formed withtwo sets of corrugations extending across them in parallel rows, one setof corrugations intersecting the other set at an angle to form outwardlyextending bulges and corresponding interior depresr SlOIlS.

THOMAS B. GRAY.

Witnesses:

CHAS. I. MOORE, F. E. GAITHER.

